34,305 Results Found

Two methods dominate the regression analysis of time-to-event data: the accelerated failure time model and the proportional hazards model. Broadly speaking, these predominate in reliability modelling and biomedical applications, respectively. However...

Leisure-time physical activity (LTPA) is associated with various health-promoting effects. However, little is known about the relationship between life events and changes in LTPA over the life course, especially when multiple life events occur simult...

This study explores how changing conditions for home-based telework affect the quality of life and social sustainability of workers in terms of time pressure and time use control in everyday life. Changing conditions concern the spread of telework to...

Since ancient times, the need for healthy water has resulted in the development of various kinds of water supply systems. From early history, civilizations have developed water purification devices and treatment methods. The necessity for fresh water...

The homogeneous branching process with migration and continuous time is considered. We investigated the distribution of the period-life $\tau$, i.e., the length of the time interval between the moment when the process is initiated by a positive number of...

This study examines the effect of commuting time on quality of life. We find that the longer the commute time workers use, the lower satisfaction with work and life they have; the long commute also causes health damage, affecting physical health and...

Modelling aging in the second life of lithium-ion batteries (LiBs) is challenging due to the complexity of degradation mechanisms that lead to capacity loss and internal resistance increase, as well as uncertainty and variability in the operational a...

Although vacuum insulated panels (VIPs) are known for their exceptional thermal insulation capabilities, their service life is limited due to an increase in internal gas pressure and material aging. In this study, an innovative monitoring system inco...

Resilience and meaning in life are significant indicators of psychological well-being and health, which are particularly important in the context of the COVID-19 pandemic. Therefore, they have been explored by a growing number of scientists. There ha...

A continuous-time Markov chain framework is developed for service life prediction of building assets, and three formulations are compared: a homogeneous generator, a time-varying generator, and a fractional model. The framework delivers survival, den...

This study investigated the life satisfaction trajectory of Korean adolescents, and factors associated with changes in life satisfaction. Specifically, we focused on how changes in time use and social relationships were associated with changes in lif...

Introduction: Breast cancer is the most common malignancy in women. Due to the large number of women living with breast cancer and the increasing incidence of this cancer, it is very important to understand the factors determining the quality of life...

Although time use is one of people’s most important resources, there are social forces and inequalities that shape how time is used. The aim of this research is to examine gender differences in time use from adolescence to old age and to analyz...

Early lithium-ion battery lifetime prediction is difficult because only a small fraction of a cell’s lifetime is observed when a prediction is needed. We evaluate a transparent, validation-tuned combination of a supervised early-cycle predictor...

Few studies have shown the combined impact of sitting time and physical activity on quality of life in older people. This cross-sectional study, using data from the 2016–2018 Korean National Health and Nutrition Examination Survey, examines the assoc...

This study investigated the influence of screen time during COVID-19 on the physical and mental domains of the health-related quality of life of early adolescents. A total of 860 early adolescents were recruited. The 36-Item Short Form Health Survey...

For a given system observed at time t, the past entropy serves as an uncertainty measure about the past life-time of the distribution. We consider a coherent system in which there are n components that have all failed at time t. To assess the predict...

Based on attenuated total reflection Fourier-transform infrared (ATR-FTIR) spectroscopy and principal component analysis (PCA), four kinds of asphalt (two kinds of matrix asphalts, TPC70# and JL70# and two kinds of modified asphalts, SBS-1 and SBS-2)...

Achieving and maintaining a high quality of life following the diagnosis of chronic illness has a positive impact on the experience of illness, including delayed disease progression and fewer relapses. Time perspective has shown promising relationshi...

Life satisfaction, an important precursor of adolescents’ well-being, is linked to daily activities. Substantial changes have been noted in adolescents’ daily activities over the years, raising the question of possible consequences for li...

The load spectrum serves as the foundation for the life analysis of aero-engine turbine disks. To enhance the accuracy of life assessments for turbine disks, this study compiles a time-varying load spectrum for turbine disks. Firstly, a surrogate mod...

In modern industrial production, the prediction ability of remaining useful life of bearings directly affects the safety and stability of the system. Traditional methods require rigorous physical modeling and perform poorly for complex systems. In th...

Background/Objectives. Despite the importance of organization-in-time ability for adults’ daily performance, knowledge about this ability in adults with attention-deficit/hyperactivity disorder (ADHD) remains limited. This study aims to compare...

Time-restricted eating (TRE) reduces weight in humans, but its effects on quality of life have not been well characterized. By performing a secondary analysis of a randomized clinical trial, we examined the effects of TRE (12-week intervention, 8 h e...

Tool wear management and real-time machining quality monitoring are pivotal components of realizing smart manufacturing objectives, as they directly influence machining precision and productivity. Traditionally, measuring and analyzing cutting force...

This paper assessed the service life of RC bridges subjected to carbonation under a changing climate based on time-dependent reliability analysis. First, a simplified carbonation model and the corresponding incremental method were briefly reviewed. T...

Background: Quality of life (QOL) is a crucial part of evaluating health conditions IN adolescents. The purposes of this study were to (1) examine the relationship of QOL and smoking, physical activity (PA) and screen time (ST) among Chinese adolesce...

It is difficult to accurately extract the health index of non-stationary signals of rolling bearings under variable rotational speed, which also leads to greater prediction error for bearing degradation models with fixed parameters. For this reason,...

A model based on a dynamical equation for the virus-to-microbe ratio (VMR) during log phase population growth shows that an optimal balance occurs between a short lysis time with low burst size vs. a long lysis time with large burst size. The model p...

The evaluation of geometric defects is necessary in order to maintain the integrity of structures over time. These assessments are designed to detect damages of structures and ideally help inspectors to estimate the remaining life of structures. Curr...

This study examined whether depression mediates a relationship between academic helplessness and life satisfaction and whether the mediating effect differs depending on participation in leisure time physical activity (LTPA) from a sample of 2384 midd...

Background: This study examined the relationship between screen time, body image satisfaction, body mass index (BMI), and quality of life among children and adolescents from two school clusters in Sesimbra, Portugal. Methods: The sample included 80 s...

Depleting fossil fuel sources and worsening global warming are two of the most serious world problems. Many renewable energy technologies are continuously being developed to overcome these challenges. Among these technologies, high-concentration phot...

This study investigates the carbon- and cost-effectiveness of decarbonization strategies in retrofits of prototypical single-family homes built before 1980 in Houston, Los Angeles, and Chicago, USA. When investigating the carbon performance of home r...

Higher sedentary time and lower physical activity (PA) are associated with a poor health-related quality of life (HRQoL) in children. The aims of this study were: (1) to analyze the sedentary time, objectively measured PA levels (light, moderate, vig...

Current research shows that individuals with intellectual disabilities do not engage in enough physical activity to acquire health benefits. However, cooperative learning has been shown to be an effective tool for inclusion and for improving healthy...

This study examines how employee experience (EX) in professional kitchens is constituted through the interplay of embodied strain, temporal constraints, care responsibilities, and the meanings attached to work. Drawing on an embedded single-case stud...

In longitudinal studies, a terminal event such as death typically halts data collection, and patients may exhibit marked changes as they approach the event. Existing methods face three related challenges: interpreting the effect of residual life on t...

The problem of shengsi 生死 (life and death) is one of the most fundamental and intractable questions of human existence, yet remarkably little systematic work has been done on the Yijing’s own conception of sheng 生 (life) an...

High intake tower structures exhibit significant time-varying characteristics in their seismic performance during service life due to environmental erosion and material deterioration. This paper establishes a time-varying seismic fragility analysis f...

The purpose of this secondary analysis is to compare the effects of two popular weight loss regimens, time-restricted eating (TRE) and daily calorie restriction (CR), on mood and quality-of-life measures in adults with obesity. Ninety participants we...

Accurate estimation of loss of life caused by dam breaches is critical for reservoir risk management and emergency planning. Traditional methods rely on static population data with poor timeliness and low spatial resolution. This study proposes a rea...

Ionic liquid electrospray thrusters are capable of producing microNewton precision thrust at a high thrust–power ratio but have yet to demonstrate lifetimes that are suitable for most missions. Accumulation of propellant on the extractor and ac...

This study investigates the influence of government effectiveness, health expenditure, and sustainable development goals (SDGs) on life expectancy in Pakistan. To accomplish this, a systematic analysis was conducted on time series data spanning from...

Crosslinked polyethylene (XLPE) distribution cables are prone to segmented thermal aging after long-term operation owing to the large spatial spans and complex operating environments, and accurate residual life prediction of each aging cable segment...

Porcelain insulators should be exchanged periodically, but their lifetime is not clearly defined. One factor that affects service life is corrosion occurring at the pin and cap—each of which is made of iron with a zinc coating. A number of porc...

Leisure time activities in childhood may have a crucial role in the development of subjective well-being. Nevertheless, more research is needed with cross-national samples concerning the differential effects of lifestyles on life satisfaction. The ai...

In this study, the real-time shelf life of frozen fillets of two different types of fish, tuna (Thunnus albacares) and hake (Merluccius hubbsi), was studied, simulating a bulk system sale. A glaze treatment was used on all the samples at the beginnin...

Background and Objectives: The increasing prevalence of end-of-life care needs in the emergency department necessitates training for emergency staff in managing terminal symptoms, facilitating serious illness conversations and ensuring goal-concordan...

Lifetime’s “Married at First Sight” (MAFS) aired its seventeenth season in 2024, averaging 2.58 million viewers per weekly episode. In this paper, we ask, how does MAFS reflect and intervene in contemporary marriage politics, partic...